Any Programmers on mac out there?

[somebodyelse5]

I NEED HELP. I am an ME student and I absolutely suck at programming, I'm trying to get some practice using c++ since i can get the program for free and it is supposed to be more powerful than matlab.

So, here is my question.

I am running on my mac book, I downloaded Xcode's (the full developers suite) but I cannot make anything compile or run, the command window never comes up with my std::cout<<

I start a "New Project"
then add a File
then I click the "Play" button.

Am i missing something?

Also, I have code that I know works in DevC and CodeBlocks on a PC but the exact same code won't work in Xcode4.

Any ideas?
Thanks guys